Sex facts... Did you know?

1. Semen contains zinc and calcium, both of which are proven to prevent tooth decay.

2. According to the Museum of Sex, the vibrator was originally used as a medicinal treatment for menstruation during the 19th century. The vibrator-induced orgasms helped doctors dissipate menstruation's anxiety-related symptoms.

3. Almost 1 in 5 men have told a woman he loves her just to get her into bed.

4. You burn about 200 calories during 30 minutes of active sex.

5. Although nearly any body part or item of clothing may be an object of sexual fetishism, the shoe and the foot are the two most common fetishes in Western society.

6. Approximately 1% of people worldwide identify as asexual (having no strong sexual attraction to either sex).

7. The average male produces several million new sperm daily. Conversely, a female is born with a finite amount of eggs and will produce no more than that throughout her lifetime.

8. Statistics show that approximately 90% of men and 65% of women masturbate from time to time.

9. The average couple spends about 20 minutes engaged in sexual foreplay prior to intercourse.

10. Worldwide, sexually active adults report having sex an average of 103 times per year.

11. Many of the ingredients in chocolate are proven to cause arousal similar in effect to sexual foreplay. In fact, some experts believe chocolate may be even more effective than foreplay for sexual arousal.

12. Both men and women can be turned on by the aromas of wine. The scents of many wines are believed to replicate human pheromones, the chemical substances that cause behavioral responses in humans.

13. Endorphins released during sexual activity create a euphoria similar to that produced by opioid drug use. These same endorphins also act as extremely effective pain killers, so having sex to cure a headache is actually a good idea.

14. The tip of the clitoris has about 8000 nerve endings, more than anywhere else on the human body. The penis only has 4000.

15. Most females have the same feeling of arousal when thinking about food as when having sex.

16. A man will ejaculate approximately 18 quarts (20.46 litres) of semen, containing half a trillion sperm, in his lifetime.

17. Men are 6 times more likely than women to actively seek sexually explicit material on the internet.

18. The smallest erect penis on record was just 1cm long.

19. According to recent surveys, the man is the most likely partner to be tied up during sex.